I'm a big fan of Michelin, and every time I'm lured into a different brand, I regret it (for all-season OR performance tires, which I had on my Jetta turbo 5 speed.) I always buy from Discount Tire now, as their customer service no matter where I go is exceptional. Right now, I have Michelin Defender XTs on my CX5, which are technically a M+S tire and I found that they do really well in snow and are excellent in rain. I'm of the thought that having a good all-season tire that will do well in that early-season snow storm that occurs before you've had a chance to switch to the snow tires is not a bad thing.
As for budgeting, buy when they are on sale as Phil mentioned above. My experience is that for a high-quality tire, you'll be closer to $700+ out the door, which includes taxes and mounting, etc.